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source: code/trunk/src/external/bullet/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp @ 7499

Last change on this file since 7499 was 5781, checked in by rgrieder, 16 years ago
Reverted trunk again. We might want to find a way to delete these revisions again (x3n's changes are still available as diff in the commit mails).
Property svn:eol-style set to `native`
File size: 11.1 KB

Rev	Line
[1963]	1	/*
	2	Bullet Continuous Collision Detection and Physics Library
	3	Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/
	4
	5	This software is provided 'as-is', without any express or implied warranty.
	6	In no event will the authors be held liable for any damages arising from the use of this software.
	7	Permission is granted to anyone to use this software for any purpose,
	8	including commercial applications, and to alter it and redistribute it freely,
	9	subject to the following restrictions:
	10
	11	1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
	12	2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
	13	3. This notice may not be removed or altered from any source distribution.
	14	*/
	15
	16	//#define DISABLE_BVH
	17
	18	#include "BulletCollision/CollisionShapes/btBvhTriangleMeshShape.h"
	19	#include "BulletCollision/CollisionShapes/btOptimizedBvh.h"
	20
	21	///Bvh Concave triangle mesh is a static-triangle mesh shape with Bounding Volume Hierarchy optimization.
	22	///Uses an interface to access the triangles to allow for sharing graphics/physics triangles.
	23	btBvhTriangleMeshShape::btBvhTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression, bool buildBvh)
	24	:btTriangleMeshShape(meshInterface),
	25	m_bvh(0),
	26	m_useQuantizedAabbCompression(useQuantizedAabbCompression),
	27	m_ownsBvh(false)
	28	{
	29	m_shapeType = TRIANGLE_MESH_SHAPE_PROXYTYPE;
	30	//construct bvh from meshInterface
	31	#ifndef DISABLE_BVH
	32
	33	btVector3 bvhAabbMin,bvhAabbMax;
	34	if(meshInterface->hasPremadeAabb())
	35	{
	36	meshInterface->getPremadeAabb(&bvhAabbMin, &bvhAabbMax);
	37	}
	38	else
	39	{
	40	meshInterface->calculateAabbBruteForce(bvhAabbMin,bvhAabbMax);
	41	}
	42
	43	if (buildBvh)
	44	{
	45	void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
	46	m_bvh = new (mem) btOptimizedBvh();
	47	m_bvh->build(meshInterface,m_useQuantizedAabbCompression,bvhAabbMin,bvhAabbMax);
	48	m_ownsBvh = true;
	49	}
	50
	51	#endif //DISABLE_BVH
	52
	53	}
	54
	55	btBvhTriangleMeshShape::btBvhTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression,const btVector3& bvhAabbMin,const btVector3& bvhAabbMax,bool buildBvh)
	56	:btTriangleMeshShape(meshInterface),
	57	m_bvh(0),
	58	m_useQuantizedAabbCompression(useQuantizedAabbCompression),
	59	m_ownsBvh(false)
	60	{
	61	m_shapeType = TRIANGLE_MESH_SHAPE_PROXYTYPE;
	62	//construct bvh from meshInterface
	63	#ifndef DISABLE_BVH
	64
	65	if (buildBvh)
	66	{
	67	void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
	68	m_bvh = new (mem) btOptimizedBvh();
	69
	70	m_bvh->build(meshInterface,m_useQuantizedAabbCompression,bvhAabbMin,bvhAabbMax);
	71	m_ownsBvh = true;
	72	}
	73
	74	#endif //DISABLE_BVH
	75
	76	}
	77
	78	void btBvhTriangleMeshShape::partialRefitTree(const btVector3& aabbMin,const btVector3& aabbMax)
	79	{
	80	m_bvh->refitPartial( m_meshInterface,aabbMin,aabbMax );
	81
	82	m_localAabbMin.setMin(aabbMin);
	83	m_localAabbMax.setMax(aabbMax);
	84	}
	85
	86
	87	void btBvhTriangleMeshShape::refitTree(const btVector3& aabbMin,const btVector3& aabbMax)
	88	{
	89	m_bvh->refit( m_meshInterface, aabbMin,aabbMax );
	90
	91	recalcLocalAabb();
	92	}
	93
	94	btBvhTriangleMeshShape::~btBvhTriangleMeshShape()
	95	{
	96	if (m_ownsBvh)
	97	{
	98	m_bvh->~btOptimizedBvh();
	99	btAlignedFree(m_bvh);
	100	}
	101	}
	102
	103	void btBvhTriangleMeshShape::performRaycast (btTriangleCallback* callback, const btVector3& raySource, const btVector3& rayTarget)
	104	{
	105	struct MyNodeOverlapCallback : public btNodeOverlapCallback
	106	{
	107	btStridingMeshInterface* m_meshInterface;
	108	btTriangleCallback* m_callback;
	109
	110	MyNodeOverlapCallback(btTriangleCallback* callback,btStridingMeshInterface* meshInterface)
	111	:m_meshInterface(meshInterface),
	112	m_callback(callback)
	113	{
	114	}
	115
	116	virtual void processNode(int nodeSubPart, int nodeTriangleIndex)
	117	{
	118	btVector3 m_triangle[3];
	119	const unsigned char *vertexbase;
	120	int numverts;
	121	PHY_ScalarType type;
	122	int stride;
	123	const unsigned char *indexbase;
	124	int indexstride;
	125	int numfaces;
	126	PHY_ScalarType indicestype;
	127
	128	m_meshInterface->getLockedReadOnlyVertexIndexBase(
	129	&vertexbase,
	130	numverts,
	131	type,
	132	stride,
	133	&indexbase,
	134	indexstride,
	135	numfaces,
	136	indicestype,
	137	nodeSubPart);
	138
	139	unsigned int* gfxbase = (unsigned int)(indexbase+nodeTriangleIndexindexstride);
	140	btAssert(indicestype==PHY_INTEGER\|\|indicestype==PHY_SHORT);
	141
	142	const btVector3& meshScaling = m_meshInterface->getScaling();
	143	for (int j=2;j>=0;j--)
	144	{
	145	int graphicsindex = indicestype==PHY_SHORT?((unsigned short*)gfxbase)[j]:gfxbase[j];
[2430]	146
	147	if (type == PHY_FLOAT)
	148	{
	149	float* graphicsbase = (float)(vertexbase+graphicsindexstride);
	150
	151	m_triangle[j] = btVector3(graphicsbase[0]meshScaling.getX(),graphicsbase[1]meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
	152	}
	153	else
	154	{
	155	double* graphicsbase = (double)(vertexbase+graphicsindexstride);
	156
	157	m_triangle[j] = btVector3(btScalar(graphicsbase[0])meshScaling.getX(),btScalar(graphicsbase[1])meshScaling.getY(),btScalar(graphicsbase[2])*meshScaling.getZ());
	158	}
[1963]	159	}
	160
	161	/* Perform ray vs. triangle collision here */
	162	m_callback->processTriangle(m_triangle,nodeSubPart,nodeTriangleIndex);
	163	m_meshInterface->unLockReadOnlyVertexBase(nodeSubPart);
	164	}
	165	};
	166
	167	MyNodeOverlapCallback myNodeCallback(callback,m_meshInterface);
	168
	169	m_bvh->reportRayOverlappingNodex(&myNodeCallback,raySource,rayTarget);
	170	}
	171
	172	void btBvhTriangleMeshShape::performConvexcast (btTriangleCallback* callback, const btVector3& raySource, const btVector3& rayTarget, const btVector3& aabbMin, const btVector3& aabbMax)
	173	{
	174	struct MyNodeOverlapCallback : public btNodeOverlapCallback
	175	{
	176	btStridingMeshInterface* m_meshInterface;
	177	btTriangleCallback* m_callback;
	178
	179	MyNodeOverlapCallback(btTriangleCallback* callback,btStridingMeshInterface* meshInterface)
	180	:m_meshInterface(meshInterface),
	181	m_callback(callback)
	182	{
	183	}
	184
	185	virtual void processNode(int nodeSubPart, int nodeTriangleIndex)
	186	{
	187	btVector3 m_triangle[3];
	188	const unsigned char *vertexbase;
	189	int numverts;
	190	PHY_ScalarType type;
	191	int stride;
	192	const unsigned char *indexbase;
	193	int indexstride;
	194	int numfaces;
	195	PHY_ScalarType indicestype;
	196
	197	m_meshInterface->getLockedReadOnlyVertexIndexBase(
	198	&vertexbase,
	199	numverts,
	200	type,
	201	stride,
	202	&indexbase,
	203	indexstride,
	204	numfaces,
	205	indicestype,
	206	nodeSubPart);
	207
	208	unsigned int* gfxbase = (unsigned int)(indexbase+nodeTriangleIndexindexstride);
	209	btAssert(indicestype==PHY_INTEGER\|\|indicestype==PHY_SHORT);
	210
	211	const btVector3& meshScaling = m_meshInterface->getScaling();
	212	for (int j=2;j>=0;j--)
	213	{
	214	int graphicsindex = indicestype==PHY_SHORT?((unsigned short*)gfxbase)[j]:gfxbase[j];
	215
[2430]	216	if (type == PHY_FLOAT)
	217	{
	218	float* graphicsbase = (float)(vertexbase+graphicsindexstride);
[1963]	219
[2430]	220	m_triangle[j] = btVector3(graphicsbase[0]meshScaling.getX(),graphicsbase[1]meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
	221	}
	222	else
	223	{
	224	double* graphicsbase = (double)(vertexbase+graphicsindexstride);
	225
	226	m_triangle[j] = btVector3(btScalar(graphicsbase[0])meshScaling.getX(),btScalar(graphicsbase[1])meshScaling.getY(),btScalar(graphicsbase[2])*meshScaling.getZ());
	227	}
[1963]	228	}
	229
	230	/* Perform ray vs. triangle collision here */
	231	m_callback->processTriangle(m_triangle,nodeSubPart,nodeTriangleIndex);
	232	m_meshInterface->unLockReadOnlyVertexBase(nodeSubPart);
	233	}
	234	};
	235
	236	MyNodeOverlapCallback myNodeCallback(callback,m_meshInterface);
	237
	238	m_bvh->reportBoxCastOverlappingNodex (&myNodeCallback, raySource, rayTarget, aabbMin, aabbMax);
	239	}
	240
	241	//perform bvh tree traversal and report overlapping triangles to 'callback'
	242	void btBvhTriangleMeshShape::processAllTriangles(btTriangleCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const
	243	{
	244
	245	#ifdef DISABLE_BVH
	246	//brute force traverse all triangles
	247	btTriangleMeshShape::processAllTriangles(callback,aabbMin,aabbMax);
	248	#else
	249
	250	//first get all the nodes
	251
	252
	253	struct MyNodeOverlapCallback : public btNodeOverlapCallback
	254	{
	255	btStridingMeshInterface* m_meshInterface;
	256	btTriangleCallback* m_callback;
	257	btVector3 m_triangle[3];
	258
	259
	260	MyNodeOverlapCallback(btTriangleCallback* callback,btStridingMeshInterface* meshInterface)
	261	:m_meshInterface(meshInterface),
	262	m_callback(callback)
	263	{
	264	}
	265
	266	virtual void processNode(int nodeSubPart, int nodeTriangleIndex)
	267	{
	268	const unsigned char *vertexbase;
	269	int numverts;
	270	PHY_ScalarType type;
	271	int stride;
	272	const unsigned char *indexbase;
	273	int indexstride;
	274	int numfaces;
	275	PHY_ScalarType indicestype;
	276
	277
	278	m_meshInterface->getLockedReadOnlyVertexIndexBase(
	279	&vertexbase,
	280	numverts,
	281	type,
	282	stride,
	283	&indexbase,
	284	indexstride,
	285	numfaces,
	286	indicestype,
	287	nodeSubPart);
	288
	289	unsigned int* gfxbase = (unsigned int)(indexbase+nodeTriangleIndexindexstride);
	290	btAssert(indicestype==PHY_INTEGER\|\|indicestype==PHY_SHORT);
	291
	292	const btVector3& meshScaling = m_meshInterface->getScaling();
	293	for (int j=2;j>=0;j--)
	294	{
	295
	296	int graphicsindex = indicestype==PHY_SHORT?((unsigned short*)gfxbase)[j]:gfxbase[j];
	297
	298
	299	#ifdef DEBUG_TRIANGLE_MESH
	300	printf("%d ,",graphicsindex);
	301	#endif //DEBUG_TRIANGLE_MESH
[2430]	302	if (type == PHY_FLOAT)
	303	{
	304	float* graphicsbase = (float)(vertexbase+graphicsindexstride);
	305
	306	m_triangle[j] = btVector3(
	307	graphicsbase[0]*meshScaling.getX(),
	308	graphicsbase[1]*meshScaling.getY(),
	309	graphicsbase[2]*meshScaling.getZ());
	310	}
	311	else
	312	{
	313	double* graphicsbase = (double)(vertexbase+graphicsindexstride);
[1963]	314
[2430]	315	m_triangle[j] = btVector3(
	316	btScalar(graphicsbase[0])*meshScaling.getX(),
	317	btScalar(graphicsbase[1])*meshScaling.getY(),
	318	btScalar(graphicsbase[2])*meshScaling.getZ());
	319	}
[1963]	320	#ifdef DEBUG_TRIANGLE_MESH
	321	printf("triangle vertices:%f,%f,%f\n",triangle[j].x(),triangle[j].y(),triangle[j].z());
	322	#endif //DEBUG_TRIANGLE_MESH
	323	}
	324
	325	m_callback->processTriangle(m_triangle,nodeSubPart,nodeTriangleIndex);
	326	m_meshInterface->unLockReadOnlyVertexBase(nodeSubPart);
	327	}
	328
	329	};
	330
	331	MyNodeOverlapCallback myNodeCallback(callback,m_meshInterface);
	332
	333	m_bvh->reportAabbOverlappingNodex(&myNodeCallback,aabbMin,aabbMax);
	334
	335
	336	#endif//DISABLE_BVH
	337
	338
	339	}
	340
	341	void btBvhTriangleMeshShape::setLocalScaling(const btVector3& scaling)
	342	{
	343	if ((getLocalScaling() -scaling).length2() > SIMD_EPSILON)
	344	{
	345	btTriangleMeshShape::setLocalScaling(scaling);
	346	if (m_ownsBvh)
	347	{
	348	m_bvh->~btOptimizedBvh();
	349	btAlignedFree(m_bvh);
	350	}
	351	///m_localAabbMin/m_localAabbMax is already re-calculated in btTriangleMeshShape. We could just scale aabb, but this needs some more work
	352	void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
	353	m_bvh = new(mem) btOptimizedBvh();
	354	//rebuild the bvh...
	355	m_bvh->build(m_meshInterface,m_useQuantizedAabbCompression,m_localAabbMin,m_localAabbMax);
	356	m_ownsBvh = true;
	357	}
	358	}
	359
	360	void btBvhTriangleMeshShape::setOptimizedBvh(btOptimizedBvh* bvh, const btVector3& scaling)
	361	{
	362	btAssert(!m_bvh);
	363	btAssert(!m_ownsBvh);
	364
	365	m_bvh = bvh;
	366	m_ownsBvh = false;
	367	// update the scaling without rebuilding the bvh
	368	if ((getLocalScaling() -scaling).length2() > SIMD_EPSILON)
	369	{
	370	btTriangleMeshShape::setLocalScaling(scaling);
	371	}
	372	}
	373
	374

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